Synthesis of arylene siloxanylene polymers and copolymers

Details Synthesis of arylene siloxanylene polymers and copolymers Synthesis of arylene siloxanylene polymers and copolymers

1982-01-27

1985-05-21

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 23, 528 25, 528 26, 528 33, 528 41, 528 42, 528 43, C08G 7760

Patent

active

045187592

ABSTRACT:
This invention is directed to the preparation of certain arylene bis-silanols in highly purified form and to the preparation of five new arylene bis-silanols in particular, along with a procedure for polymerizing these and other arylene-type bis-silanols using phosgene as a polymerization promotor or catalyst, to obtain highly purified, high molecular weight arylenesiloxanylene polymers having the characteristic structure: ##STR1## where Y is an arylene or substituted arylene moiety: R and R' are the same or different alkyl group(s), substituted alkyl group(s) or a phenyl group, X ranges from about 1 to 3 and n ranges from about 300 to 1500, said polymers having molecular weights (number average) of 100,000 and higher.
Preferred polymers are those arylenesiloxanylenecarbonate polymers which, when laminated to polycarbonate sheets or glass maintain their transparency, stability and adherence to said substrates at temperatures of up to and including 400.degree. F. Such polymers are useful for the formulation of high temperature interlayers for windshields and canopies for aircraft and related aerospace vehicles.

REFERENCES:
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patent: 2999845 (1961-09-01), Goldberg
patent: 3287310 (1966-11-01), Omietanski
patent: 3444127 (1969-05-01), Breed
patent: 3595974 (1971-07-01), Lloyd et al.
patent: 3600288 (1971-08-01), Viventi
patent: 3697569 (1972-10-01), Mironov et al.
patent: 3832419 (1974-08-01), Merritt, Jr.

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